Susan has a birdfeeder in the shape of a rectangular prism. It is filled with bird seed to a height of \frac{5}{8} 8 5 ​ feet as shown. How many cubic feet of bird seed does Susan need to fill the rest of the birdfeeder?

since your problem is x^4 = 81, what you have to undeo is the "to the fourth power" part.

the inverse (opposite operation) of "to the fourth power" is "to the fourth root".

  (x^4) ^ ¼   = 81 ^ ¼  

  81 = 3^4     so (3 ^ 4) ^ ¼   =   3 ^ 1   = 3

by hand: (3 ^ 4) ^ ¼   =   3 ^ (4 x ¼) = 3 ^ 1   = 3   (when you take a power to a power, multiply the exponents.)

or, do it by calculator. one way of finding the fourth root is to use ^ (1/4)

step-by-step explanation:

5/20 so 25%

step-by-step explanation:

it would be a on edgenuit y

the diagram below is your final answer